/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.miit.elearning.servlets;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Session;
import ru.miit.elearning.hibernate.dao.CourseDAO;
import ru.miit.elearning.hibernate.dao.HibernateUtil;
import ru.miit.elearning.hibernate.dto.CurriculumLevel;

/**
 *
 * @author Cyclone
 */
public class AddLabServlet extends HttpServlet {

    //TODO MEGATASK: create WorkItems for each user of course ID courseId
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");

        Session session = null;
        String message = "";
        boolean completable = true;
        try {

            int directionId = Integer.parseInt(request.getParameter("directionId"));
            int courseId = Integer.parseInt(request.getParameter("courseId_" + directionId));

            String labTitle = request.getParameter("labTitle");
            if (labTitle == null || labTitle.trim().equals("")) {
                message = "Название практической работы не введено<br/>";
                completable = false;
            }

            Integer labNumber = null;
            String labNumberString = null;
            if ((labNumberString = request.getParameter("labNumber")) != null && labNumberString.length() > 0) {
                try {
                    labNumber = Integer.parseInt(request.getParameter("labNumber"));
                } catch (Exception e) {
                    e.printStackTrace();
                    message += "Номер практической работы указан неверно<br/>";
//                    completable = false;
                }
            }

            if (!completable) {
                getServletContext().setAttribute("message", message);
                response.sendRedirect("Labs");
            }

            String description = request.getParameter("description");

            session = HibernateUtil.getSessionFactory().getCurrentSession();
            session.beginTransaction();

            CourseDAO courseDAO = new CourseDAO(session);
            CurriculumLevel lab = courseDAO.addLab(courseId, labTitle, labNumber, description);

            if (session != null && session.isOpen()) {
                session.getTransaction().commit();
            }

            message = "Практическая работа №" + lab.getNumeral() + " <a href='Lab?id=" + lab.getId() + "' title='Подробнее о практической работе'>\"" + lab.getTitle() + "\"</a> " +
                    "добавлена к курсу <a href='Course?id=" + lab.getCurriculumLevel().getId() + "' title='Подробнее о курсе'>\"" + lab.getCurriculumLevel().getTitle() + "\"</a>";

            getServletContext().setAttribute("message", message);
            response.sendRedirect("Labs");

        } catch (Exception e) {
            if (session != null && session.isOpen()) {
                session.getTransaction().rollback();
            }
            e.printStackTrace();
            message = "Ошибка создания практической работы";

            getServletContext().setAttribute("message", message);
            response.sendRedirect("Labs");
        } finally {
            if (session != null && session.isOpen()) {
                session.close();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
